Ke$ha has said she’s honoured to be a co-writer on Britney Spears’ new single, ‘Till The World Ends.’

“I consider myself a songwriter before and above everything else so it’s an honour to write for one of pop music’s biggest icon,” she told MTV.  “And I hope it gets everyone's ass on the dance floor 'cause y'all know that's what K-Monay does best!” 

Listen to ‘Till The World Ends’ here: